Effects of Electroosmotic Flow on Ionic Current Rectification in Conical Nanopores

被引：160

作者：

Ai, Ye ^{[1
]}

Zhang, Mingkan ^{[1
]}

Joo, Sang W. ^{[2
]}

Cheney, Marcos A. ^{[3
]}

Qian, Shizhi ^{[1
,2
]}

机构：

[1] Old Dominion Univ, Dept Aerosp Engn, Norfolk, VA 23529 USA

[2] Yeungnam Univ, Sch Mech Engn, Kyongsan 712749, South Korea

[3] Univ Maryland Eastern Shore, Dept Nat Sci, Princess Anne, MD 21853 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2010年 / 114卷 / 09期

关键词：

SOLID-STATE NANOPORE; ELECTROCHEMICAL TRANSPORT-PROPERTIES; TUNABLE NANOFLUIDIC DIODE; CONE-SHAPED NANOPORE; ELECTROPHORETIC MOTION; SPHERICAL-PARTICLE; DOUBLE-LAYERS; NARROW PORES; CHARGE; NANOCHANNELS;

D O I：

10.1021/jp911773m

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The effects of electroosmotic flow (EOF) oil the ionic current rectification (ICR) phenomenon in conical nanopores,ire studied comprehensively With use of a continuum model, composed of Nernst-Planck equations for the ionic concentrations, the Poisson equation for the electric potential, and Navier-Stokes equations for the flow field. It is found that the preferential Current direction of a negatively charged nanopore is toward the base (tip) under a relatively high (low) kappa R-1, the ratio of the tip radius size to the Debye length. The direction also changes with the charge polarity of the nanopore. The EOF effect on the ionic Current rectification ratio in a conical nanopore becomes noticeable at an intermediate kappa R-1 and Surface charge density of the nanopore, meanwhile increasing significantly with the applied voltage.

引用

页码：3883 / 3890

页数：8

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